CVE-2020-15173
In ACCEL-PPP (an implementation of PPTP/PPPoE/L2TP/SSTP), there is a buffer overflow when receiving an l2tp control packet ith an AVP which type is a string and no hidden flags, length set to less than 6.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In ACCEL-PPP (an implementation of PPTP/PPPoE/L2TP/SSTP), there is a buffer overflow when receiving an l2tp control packet ith an AVP which type is a string and no hidden flags, length set to less than 6. If your application is used in open networks or there are untrusted nodes in the network it is highly recommended to apply the patch. The problem was patched with commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b As a workaround changes of commit 2324bcd5ba12cf28f47357a8f03cd41b7c04c52b can be applied to older versions.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.18% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-120
- Affected
- accel-ppp/accel-ppp
- Source
- security-advisories@github.com
References
- https://github.com/accel-ppp/accel-ppp/commit/2324bcd5ba12cf28f47357a8f03cd41b7c04c52bPatch, Third Party Advisory
- https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-rr68-fchr-69vfThird Party Advisory
- https://github.com/accel-ppp/accel-ppp/commit/2324bcd5ba12cf28f47357a8f03cd41b7c04c52bPatch, Third Party Advisory
- https://github.com/accel-ppp/accel-ppp/security/advisories/GHSA-rr68-fchr-69vfThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.